If any of you guys are entertaining thoughts of playing through Monster Maker (recommended for fans of slow battle systems), you'll want to know about this severe glitch.
Black Tiger and I both played far into the game and got stuck in the very same spot: a tower room with two stairways, both of which essentially lead to dead ends (they both lead to the same next room, but the walls of the room "magically" reconfigure themselves so that you cannot proceed no matter which stairway you took).
I started a whole new game a few days ago and figured out how to get past that spot. Here's what you need to do:
When you enter the tower in question for the first time, do not leave it until you reach that spot. This can be hard and annoying because the tower is quite large, and you have to find a "hidden" stairway in order to even make it to the tricky spot in question. Level up a lot beforehand so that you can run away from at least most of the battles.
When I reached the room with the two stairways, I took the left one up. I was at a dead end, but this time, my characters had a conversation. I didn't go back downstairs; instead, I took a few steps forward and walked behind a wall and more text came up, and then a new stairway was revealed that led to the next part of the tower.
If you enter and then leave the tower without making it to that room first, your characters will never have that conversation, and you will be stuck at that spot FOREVER. Yep, all those hours it took to get that far will be wasted. That's what happened to me the first time I tried the game, and probably to Black Tiger too.
Oh, there are a lot of towers, so I should probably specify which one it is. It's the second one you have to visit after you get the "Orc Dragon" to ride. It's to the west of a town that has an inn that charges 160 gold pieces.
Thanks to Laurent from VGDen, who mentions such a glitch in his review of MM. He said he read about it in documentation for the game, but never got far enough to verify that it actually existed. Well, I can now verify it. I turned the game off immediately after figuring it out because I rushed to that point and my characters were severely underleveled, so I haven't gotten any further yet, and I don't know if there's any other such bullshit yet to come. But I'll report back if there is.